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  <title>Fetches all rows in a particular result column as an array</title>
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 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.pg-fetch-all-columns" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">pg_fetch_all_columns</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.1.0, PHP 7)</p><p class="refpurpose"><span class="refname">pg_fetch_all_columns</span> &mdash; <span class="dc-title">Fetches all rows in a particular result column as an array</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.pg-fetch-all-columns-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>pg_fetch_all_columns</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$column</code><span class="initializer"> = 0</span></span>
  ] ) : <span class="type">array</span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>pg_fetch_all_columns()</strong></span> returns an array that
   contains all rows (records) in a particular column of the result resource.
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数将 NULL 字段设置为 PHP <strong><code>NULL</code></strong> 值。</span></p></blockquote>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.pg-fetch-all-columns-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">result</code></dt>

     <dd>

      <p class="para">
       PostgreSQL query result resource, returned by <span class="function"><a href="pg_query.html" class="function">pg_query()</a></span>,
       <span class="function"><a href="pg_query_params.html" class="function">pg_query_params()</a></span> or <span class="function"><a href="pg_execute.html" class="function">pg_execute()</a></span>
       (among others).
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">column</code></dt>

     <dd>

      <p class="para">
       Column number, zero-based, to be retrieved from the result resource.  Defaults
       to the first column if not specified.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.pg-fetch-all-columns-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   An <span class="type"><a href="language.types.array.html" class="type array">array</a></span> with all values in the result column.
  </p>
  <p class="para">
   <strong><code>FALSE</code></strong> is returned if <code class="parameter">column</code> is larger than the number 
   of columns in the result, or on any other error.
  </p>
 </div>

 
 <div class="refsect1 examples" id="refsect1-function.pg-fetch-all-columns-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2487">
    <p><strong>Example #1 <span class="function"><strong>pg_fetch_all_columns()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php&nbsp;<br />$conn&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">pg_pconnect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">);<br />if&nbsp;(!</span><span style="color: #0000BB">$conn</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"An&nbsp;error&nbsp;occurred.\n"</span><span style="color: #007700">;<br />&nbsp;&nbsp;exit;<br />}<br /><br /></span><span style="color: #0000BB">$result&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"SELECT&nbsp;title,&nbsp;name,&nbsp;address&nbsp;FROM&nbsp;authors"</span><span style="color: #007700">);<br />if&nbsp;(!</span><span style="color: #0000BB">$result</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"An&nbsp;error&nbsp;occurred.\n"</span><span style="color: #007700">;<br />&nbsp;&nbsp;exit;<br />}<br /><br /></span><span style="color: #FF8000">//&nbsp;Get&nbsp;an&nbsp;array&nbsp;of&nbsp;all&nbsp;author&nbsp;names<br /></span><span style="color: #0000BB">$arr&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">pg_fetch_all_columns</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.pg-fetch-all-columns-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="pg_fetch_all.html" class="function" rel="rdfs-seeAlso">pg_fetch_all()</a> - 从结果中提取所有行作为一个数组</span></li>
   </ul>
  </p>
 </div>

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